Yes, your 2nd grandmother was a sister to my g-grandfather, Edward Bridges. I think Margaret was born in 1871, to Richard and Lovinda (Barnhart) Bridges. Richard was a son of Hamilton and Sarah (Morrow) Bridges. The Civil War records of Hamilton are as far as I have been able to trace, and haven't found any more on Sarah.
Edward married Harriet Brannigan, and their 1st son, Luke James, was my maternal grandfather.
I'm glad there are still family interested out there.